In our work, we have calculated the partial wave coefficients that govern the leading Regge behaviour in \(D=4\) . We have shown that the associated coefficients are positive. Since the coefficients governing the subsequent subleading Regge trajectories have increasingly larger values, our work indicates the positivity of the Coon amplitude for all partial wave coefficients in \(D=4\) . An interesting direction would be to investigate the same for general \(D\) , possibly along the lines of [1]}.
